Improvement of light extraction efficiency of display devices by using sub-wavelength scale structure

  • Kwon, Oh-Yung (Plasma laboratory, Display Technology Research Center, Department of Electrical Engineering and Computer Science, Seoul National University) ;
  • Whang, Ki-Woong (Plasma laboratory, Display Technology Research Center, Department of Electrical Engineering and Computer Science, Seoul National University)
  • Published : 2009.10.12

Abstract

It is suggested that the light extraction efficiency of the display device can be improved by adoption of periodic array of sub-wavelength scale structures. The relief of the total reflection has been investigated using the rigorous coupled wave analysis (RCWA). Various shape of the sub-wavelength scale structure allowed to have non vanishing transmittance for the light rays with the incident angle bigger than the critical angle.

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